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Irradiation-disorder Creation in SrTiO3

Published online by Cambridge University Press:  31 January 2011

S. Soulet ,
J. Chaumont ,
C. Sabathier  and
J-C. Krupa
S. Soulet
Affiliation:
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CNRS-IN2P3, 91405 OrsayCampus, France, and CEA-Cadarache, DESD/SEP/LEMC, 13108 Saint-Paul-lez-Durance, France
J. Chaumont*
Affiliation:
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CNRS-IN2P3, 91405 OrsayCampus, France
C. Sabathier
Affiliation:
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CNRS-IN2P3, 91405 OrsayCampus, France, and CEA-Cadarache, DESD/SEP/LEMC, 13108 Saint-Paul-lez-Durance, France
J-C. Krupa
Affiliation:
Institut de Physique Nucléaire, CNRS-IN2P3, 91406 Orsay Cedex, France
*
a)Address all correspondence to this author. e-mail: chaumont@csnsm.in2p3fr
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Abstract

The chemical durability of crystalline matrices loaded with actinides can be stronglyreduced when α-decays generate enough disorder to induce a crystalline to amorphoustransition. The alpha decay of actinides in SrTiO3 (α-recoils and α-particles) was simulated using Pb and He irradiation. This study shows that the He-ion annealingprocess that operates in some apatitic structure is negligible in SrTiO3 where thedisorder evolution at room temperature has a strong sigmoid dependence on dose. Thedirect-impact/defect-stimulated model, the cascade quenching/epitaxial recrystallizationmodel, and a direct-impact/cascade-overlap model were used to reproduce the SrTiO3-disorder evolution under Pb-ion irradiation.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 1 , January 2002 , pp. 9 - 13
Copyright
Copyright © Materials Research Society 2002

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